Chem 2540 – SP22R EXTRACTION OF CAFFEINE FROM TEA
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Chem 2540 – SP22R
EXTRACTION OF CAFFEINE FROM TEA
CONCEPT QUESTIONS
(1) For the following reactions, predict the product of the acid- base reaction (clearly showing important lone pairs and bonds), use arrow-pushing to show the electron movement and changes in bonding, and determine which side of the equilibrium is favored. Explain your answer for the direction of the equilibrium by referencing the factors that determine acidity and the stability of the conjugate base.
(2) Below is an Extraction Flowchart for the separation of a three-component mixture. Several of the steps are missing, as well as several of the structures throughout the flowchart. Using the ChemDraw Template provided, fill in the missing steps and structures. In each step, be sure that all necessary reagents (organic solvents, aqueous solutions, drying agents) and manipulations (shaking/mixing, separating phases, filtering/decanting) are included in their proper order. Clearly indicate the structures of the compounds at each step in the process, and be sure to refer to Lab Manual Section 8.5 for an example of the format.
2022-02-10